I called Comcast and had them repair my cablecard this morning. She did the pairing and then had me disconnect the coax from the back of the Tivo and that fixed all my issues I've been having there. Going to just do that to all the Tivo's and see if that helps my pixelation problem.

In my area Comcast recommends that you have a direct feed from a two way splitter to feed your cable modem and use the second port to feed the rest of the house. Check to make sure the connectors on the coax are good. A bad shield crimp can cause a lot of problems. If you have a crimper I would put new ends on the coax just to be sure.

I would suggest you use a broadband splitter rather than the basic cable company standard in case you want to make use of the moca capability of the Elite which sometimes requires a frequency above 1000 mhz. Something like